std::atan

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Defined in header `<cmath>`

float atan( float arg );

double atan( double arg );

long double atan( long double arg );

Computes arc tangent of arg

arg

-

floating point value

arc tangent of arg in radians in the range of [-π/2; π/2] radians.


atan2	arc tangent, using signs to determine quadrants (function)

asin	computes arc sine ( $arcsin(x)$ ) (function)

acos	computes arc cosine ( $arccos(x)$ ) (function)

tan	computes tangent ( $tan(x)$ ) (function)

atan(std::complex) (C++11)	computes arc tangent of a complex number ( $arctan(z)$ ) (function template)

atan(std::valarray)	applies the function std::atan to each element of valarray (function template)